The model has 42 of 100 parts shaded to represent 0.42. A model divided into 100 parts. 42 are shaded gray.

Arianna models the solution to 0.42 – 0.03 by shading in black each of the parts she is subtracting from 0.42. Which models the solution?

A model divided into 100 parts. 42 are shaded gray. 3 are shaded black.
A model divided into 100 parts. 42 are shaded gray. 30 are shaded black.
A model divided into 100 parts. 39 are shaded gray. 3 are shaded black.
A model divided into 100 parts. 12 are shaded gray. 30 are shaded black.